Improvement in grinders for harvester-knives



. W. COMEY. I GRINDER FOR HARVES'IEP. KNIVES. No. 192,815. Patented J'u1 y'10. 1877.

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WILLARD COMEY, OF WESTBOBOUGH, MASSACHUSETTS.

IMPROVEMENT IN GRINDERS FOR HARVESTER -KNIVES.

Specification forming part of Letters Patent No. 192,816, dated July 10,18 77 application filed May 7. 1877.

ground may be presented to the grindingwheel at any desired angle andposition, and may be readily attached or removed from the holder.

Figure 1 is a plan of my invention. Fig. 2 is a vertical longitudinalsection of the same. Fig. 3 is a vertical section, parallel with theknife-blade, showing the holding device. Fig.

i 4 is a section showing one of the clamps for holding the blade.

A represents a table, upon which are erected two vertical standards, B,each of said standards being provided with a horizontal arm, B, Figs. 1and 2, in which are hung the emery-wheel G and the gear-wheels D and D,which serve to drive the emery-wheel.

Motion may be communicated to my wheels by a crank or'iootlever, or bypower.

E represents the blade to be ground, Whic is held in a holder, E E. Thisis constructed as follows: The rod h has attached to it, near themiddle, two forked pieces, It [5. (Shown in Figs. 1, 2, and 3.) Therecesses formed by the fork serve as resting-places for the blade E. Ialso attach to this rod it two screwclasps, F F, Fig. 1. (Shown indetail at Fig.

4.) These clasps are formed of a fixed part,

which is fastened to the rod h, and a hinged part, F, which is operatedby the screw F and serves to clasp the blade E. These screwclasps F Fand the pieces k is all hinge on the pintle d. The extremities of therod h are bent so as to form prongs for receiving the ends of the bladeE. The pintle dis madefast by eyepiece e c, Fig. 3, to a rocking andsliding block, E. This block H has a curved bottom, as shown in Fig. 3,and is set in a concave recess formed by the parts H H and K, (see Fig.2,) so that it, the block H,- and the holder may be adjusted lengthwise,and also horizontally, and may be set at any desired angle, and may beheld by the thumb-- screw H Fig. 2.

K is a block, which is fastened to a sliding base, A, (see Figs. 2 and3,) by means of a pivot, K so that it may turn in any direction. Thesliding block is held by ways K K to the table A. K is a set-screw forholding the block K at the desired angle on the base A.

I claim- 1. In combination with the grinding mechanism, theblade-holding device E E and the rocking sliding block H, all operatingtogether, substantially as described, and for the purpose set forth. V

2. The combination of the holder E E and therockin g sliding block Hwith the block K' WILLARD ooMEY.

Witnesses: v

WILLIAM EDVSON, NATHL. EVANS.

